Bolt for boilers.



M. PASCALE.

BOLT FOR BOILERS.

APPLICATION min luLY n. |915.

Patented Ang. 6, 1918.I

i Z -Fa/50426.

PATENT `onori-CE.

H A. ommen STATES MIGUEL PAG-ALE.. Dit? TUCSON', ARIZONA.

.BOLT FOR BILERS.

To all @einem it mojo' no. Be it lknown, thot I,

, tee.

I struction, und moons :for seem-ing the lend `of the shailk to u sheet such. es the fire box sheet. -It is un objoot of this 'invention to pro-r vide a. mnstruotion su' sible for stoy und crown bolts w'liiob `will. not to give u greater radiating surface for lient from, the fitto box. It .is another objeot oi? thi invention to providel bolts .of the ohorooter above doy scribed with tell-"tele means wherebyT if u. bolt brooke it oon be located by the Water or steam spittiiilg :into the .ii :bom

It n forth object of t invention to provide ooi truetifmoft i ohernoter de 'the ooiilneotit i of the bolt to the tire Ibo ourely nubile.. t joint, and when. of the shook :it t

This feature of i trnctioii ie oleo adeptable for senuriog .te to sheets, l a

A Still. further object of th* invention is to provide n hollow crown bolt or: the like with toll-tule menne 'and a fusible plug to operate the telltale on u rise of ternplitl toro to o predoteriiniiuui point. This rise of ttnnpei'eture muy be dueto various causes Well. kruinvn in the nrt.

I umm thoee obje by' menne ofngv ii ei ion illustrated pun drawing, in which: 1o n longitudinal eeotion oi a in the nooo Figure l, stav bolt.

Fig. Eds :t h'ingitufliuol motion onlin. .stay bolt with n xnomliiiod form oil" heur.. Fig. 3 e longitudinol Section of o. sta bolt with u further .modified forni of hem. .i

Fig. 4; is ay erosie een-tional View of :i orown bolt. y

Fig'. 5 is a. longitudinnl eection ofi fluo embodying the tentures of my invention. Fig. 6 is a. lougitudinel, Sectio-r1 oi o. repair bolt.

Referido. f the bol ie b nhnnk bu lo. r

. 'l th o Bpeeiegtion of Lettera Patent. ,application nel my 11, me. semi no, 10mn.

i relates-to bolts for boilore and port particularly to the shunt; oon- The sleeve 13 Patented Aug. e, 191s.

,educed and threaded as indicated by 9 to foi-m n stem. Extend' the bolt and situated tile bore 10. The numeral 11 indicates `e fire box sheet, and 12 the boiler shell. space between sheets 11 and 12 is, es well knovvn, filled with water.

.A sleeve 13 ie placed upon the shank 7 and lng vlongitudinally of j .y in the stem is a tell- The The open end of d l the shank communicates with the fire box. t l5 is beaded over the sheet. The sleeve is preforeilly Welded near the upper end 15 to the shank, the lower endisexternally threaded 'as indieeted by 16. The bolt is threaded into the hole formed in the fire box Sheet and bonded over 'to provide a. non-leek joint. forms a connection such that breaking of the shank nt the sheet 11 due to u. relative movement between the shank und sheet will. be minin'aized; `There is also less liability to rust at the juncture of the sheet and, bolt`- some their .ility for the connection between n' the lire box sheet mul the bolt.

.ln effect, the sleeve providesA n. Win te noted. that the ten-tale bm io 'th stem u" not open through the head end ofy l A houd 17 having n surface ofl curved form nml preferably forming part of the surface oi." a sphere is threaded on .to the end of the bolt und the' shank is then 11p-setl or rivetedy an indicated by 18 to lock the head to the shank. A socket sleeve 19 having threads on. its exterior is engaged with a threaded hole 201 in the sheet 12. The

bore 21 ofslightly greater ol'lt'vature ,then the hond 17'. through the socket sleeve and connects `with the bore 21 so that head 17 forms with bom 21 zi. flexible joint.` The fieri `bole`22 per. mits rocking of the bolt shan on to the srmketmfeeve 19 is a cap` 23 oompleting the bolt.

Y It is obvious that socket Sleeve has n substantially half-round A- Haring 4bOIe 22 extends Threaded' head end permits movement of the bolt as the sheet moves due to ex eneion and oontractlon or vother causes. e curvature of the heed 17 being' less than thecurvature of `the bore 21, the he'ad will`bear upnthe wall of the bore only a slight amount und e tight joint will be formed. 1

Referring to Fig/@2z the sbonk 24 is hollow, vlnsleev'e 25 1e provided as in the oonetruotlon showmin Fig. 1. A threaded llt) boro 26 communicates with the of the .l

the construction at the.

l The sheet 3f has a bore 32 of greater diameserves as a socket for the shank. A ball head 27 is provided with'a stem 28 which is threaded adjacent the end and engages with the threaded 'bore 26. The stem is provided with a longitudinally ex, tending tell-tale hole 29. The stem is threaded into. the bore and the end riveted over as indicated by 30, forming a secure connection.

ter than the external diameter of stem 28, and a counterborev33 of round form which assist in forming a tight joint. A halfround head 40 is threaded on to thesh'ank and the shank riveted over as in the construction shown in Fig. 1. A washer 41 having Fig.4 illustrates a crown bei?) l5. has

- a tapering shank 44. This shank is hollow l'and provided with. a stein. 45 of reduced diameter. Adjacent the open end of the shank isa sleeve 4 6 which is threaded on its exterior and welded to the shank. The end 47 is beaded over the crown sheet, as in the constructions before described. A tell-tale bore 48V communicates with the` hollow portion-of the shank and extends through the stem end having a ta ered counterbore 49- at its end in which is p aced a fusible plug 50; this being soldered to the shank or secured thereto in any other suitable way. Upon the plug 50 being exposed because of lack of water or becoming heated for `any other cause the plug melts. This causes steam or water to spit into the fire box indicating the water is low, or that there 'is other trouble, also relieving the pressure and thereby safe.-y guard' the boiler. A half-round; head 51 ,isk threa edonto the stein 45 andthe latter riveted over. The head rests in a socket 52 lfloriiiied in a stay 53, thus providing aexible Fig. 6 illustrates a repair bolt which has a hollow shank 54, a' stem 55 of reduced diameter having a tell-tale bore 56 which isclosed at the head end of the stem. A lsleeve 57 is welded. on to theshank 54. This sleeve overlaps the end of the shank. A bead member `58 is welded to the sleeve 57 and the shank 54. When beadedsleeve and shank have a s nection, but when joint, due to the meltin practically a line. The ead end of the stem A55 is threaded into the sheet 59 and rivet- `i ed 'oven In the substitution of a repair bolt for l.one of my'bolts before described, it would a curved bore provides a socket forv the head 40. Cap 42 is welded to the sheet 43.

" :in each one `placed, upon the shank, as the sleeve joined before weldiig thev terp@ A the weld-is elected, the

ofthe parts, will be th -necessary'to thread out the bolt hole in the It is obvious that the hot gases from the' iire box will enter the hollow bolt and provide increased heatingA surface for the Water within the boiler, thereby increasing the j.

iciency of the boiler. If a break occurs in the shank of the bolt, steam will enter the ire box. If this breakv occurs at the stem A end of the shank, a position where it is most likely to occur, the tell-tale hole admits water or steam to the bore of the shank and allows the latter4 to spit into the fire box, thereby indicating the bolt which is broken. Y

In Fi 4 a fusible plug has been. shown closing t e tell-tale. IThis fusible plug may be substituted in any other of the tions shown when those constructions are construcy used in places liable to injury b overheating. The'cop er ferrule may a so be used ci) the ,constructions described. I do'liot limitl my invention to the sleeve may. be made in al with the shank.

Fig. 5 ows a fire tube 60 forming a iiue. The lire tube has a sleeve 61 placed, adjacent its end as in the bolt construction. The

Ileeve is threaded on its exterior to engage threads in the flue lsheet 62. The extension 63 is beaded over as in the bolt, and in order to provide additional security the tube is expanded as'indicated at G4. A. sleeve 65 is placed upon the `other end of the tube and preferably secured thereto by welding. The sleeve has a sliding connection with the sheet 66. The construction just described is ,such that the tube will not easily break. A

certain degree of flexibility is aiiorded between the eonnections'o the tube and. sheets.

The joint formed is non-leak, and there is little liability of rusting,r tubes at the sheets.

What I claim is: 1. A. bolt havin a hollow shank open at one end a'tell-tale ore communicatin with` the hollow shank closed at the hea end thereof by 'a fusible plu 2. In a boiler, a tub and breaking of the 55er member open at one end, a sleeve secured thereto adjacent said open end to enlarge the same, a ferrule of ductile material inte osed. between saidsleeve `and, tubular mem ier, and an exten- SinoAfnember ld ted o beaded. t a' a 0.owsan oponat one end, a tellale b e'hollow shank and closed at the head end thereof said shank being of enlarged diameter and thickness adjacent the open end thereof, land an extension of said sli-.anladapted to be beaded.

ore communicating with 4. A boit having a hollow' Shana pent ias said hollow shank lurged one end, a tell-tale bore con'lmunicating with the hollow shank and closed at the head end thereof, a, sleeve umunted adjacent said open end to tllioken the Same, and an extension of adapted to `be beaded.

5. A holt having u hollow shank open at one end, u tell-tale bore Communicating with the hollow wink and closed at the head end thereof, n sleeve mounted adjacent said open end to tl'xioli'en the .sume a `l'errnle of ductile illutoriul illterposeil hetween said Sleeve and hollowl shook, und un extension of said'hollow shank adepti-.1d lio he beaded.

6. A. holt having .fl .hollow shank open at one end, u tell-tule bore Communicating with the hollow shook und closed at the .head end thereof by n fusible plug, seid shank of endiiam'leter and thickness adjacent the open end thereof, and `an extension of said shank adapted to be beaded..

-thirfken the same,

7. A `bolt havin' ore communicating with the hollow shank and closed at the head end v thereof hy a fusible plug, a sleevemounted on said shank adjacent said open end to nml :In extension of Suid hollow shank adopted to be beaded.

8. A bolt having a hollow shank open at one e'nd, ay tell-tale bore conununieuting with; the hollow shank and closed alt thol houd endl thereof by a fusible, plug, n. sleeve mounted on Said Shank adjacent Suid open mul to thicken the same, uy fel-rule of duvtile "uw terial interposed between said sleeve uml hollow shank :md ber adapted to be headed.

In witness that l claim the fm1-going .l

have hereunto suljsorihed my name this 29th day of June, 1916. l

.MIG UEL PASCALE.

un extension of Suid lueur 

